The HEMCO Config.rc file

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Overview

In GEOS-Chem v10-01 and later versions, emissions are read, regridded, and calculated by the HEMCO emissions component. The emission settings are specified in the HEMCO Configuration file (HEMCO_Config.rc).

For more information about the HEMCO_Config.rc file, please see:

--Bob Yantosca (talk) 23:25, 16 November 2016 (UTC)

Enabling and disabling emissions

The HEMCO_Config.rc file for each GEOS-Chem simulation contains a set of switches that allow you to quickly toggle individual emissions inventories on or off.

Each time you create a GEOS-Chem run directory, a new HEMCO_Config.rc file with default emissions settings will be created in the run directory. These default settings are located near the top of the HEMCO_Config.rc file.

To see the HEMCO_Config.rc file that ships with the current version of GEOS-Chem, please follow this link.

For example, the default emissions settings for the fullchem simulation are:

###############################################################################
### BEGIN SECTION EXTENSION SWITCHES
###############################################################################
# ExtNr ExtName                on/off  Species  Years avail.
0       Base                   : on    *           
# ----- MAIN SWITCHES -----------------------------------------
    --> EMISSIONS              :       true
    --> METEOROLOGY            :       true     # 1980-2020
    --> CHEMISTRY_INPUT        :       true
# ----- RESTART FIELDS ----------------------------------------
    --> GC_RESTART             :       true
    --> STATE_PSC              :       true
    --> HEMCO_RESTART          :       true
# ----- NESTED GRID FIELDS ------------------------------------
    --> GC_BCs                 :       false    # 1980-2020
# ----- REGIONAL INVENTORIES ----------------------------------
    --> APEI                   :       false    # 1989-2014
    --> NEI2011_HOURLY         :       false    # 2006-2013
    --> NEI2011_MONMEAN        :       false    # 2006-2013
    --> MIX                    :       false    # 2008-2010
    --> DICE_Africa            :       false    # 2013
# ----- GLOBAL INVENTORIES ------------------------------------
    --> CEDS                   :       true     # 1970-2017
    --> CEDS_byFuelType        :       false    # 1970-2017
    --> EDGARv43               :       false    # 1970-2010
    --> HTAP                   :       false    # 2008-2010
    --> GEIA_NH3               :       true     # 1990
    --> SEABIRD_NH3            :       true     # 1990
    --> POET_EOH               :       false    # 1985
    --> TZOMPASOSA_C2H6        :       true     # 2010
    --> XIAO_C3H8              :       true     # 1985
    --> LIANG_BROMOCARB        :       true     # 2000
    --> ORDONEZ_IODOCARB       :       true     # 2000
    --> AEIC                   :       true     # 2005
    --> DECAYING_PLANTS        :       true     # 1985
    --> AFCID                  :       true     # 2015
# ----- SHIP EMISSIONS ----------------------------------------
    --> SHIP                   :       true
    --> CEDS_SHIP              :       true     # 1970-2017
    --> CEDS_SHIP_byFuelType   :       false    # 1970-2017
    --> HTAP_SHIP              :       false    # 2008-2010
    --> ICOADS_SHIP            :       false    # 2002
    --> ARCTAS_SHIP            :       false    # 2008
    --> CORBETT_SHIP           :       false    # 1985
    --> NEI2011_SHIP_HOURLY    :       false    # 2006-2013
    --> NEI2011_SHIP_MONMEAN   :       false    # 2006-2013
# ----- FUTURE EMISSIONS --------------------------------------
    --> RCP_3PD                :       false    # 2005-2100
    --> RCP_45                 :       false    # 2005-2100
    --> RCP_60                 :       false    # 2005-2100
    --> RCP_85                 :       false    # 2005-2100
# ----- BIOMASS BURNING EMISSIONS -----------------------------
    --> QFED2                  :       false    # 2000-2020
    --> GFAS                   :       false    # 2003-2020
# ----- OFFLINE EMISSIONS -------------------------------------
# To use online emissions instead set the
# offline emissions to 'false' and the
# corresponding HEMCO extension to 'on':
#   OFFLINE_DUST        - DustDead or DustGinoux
#   OFFLINE_BIOGENICVOC - MEGAN
#    - Note: MEGAN must always be on for certain
#            species not in OFFLINE_BIOGENICVOC
#   OFFLINE_SEASALT     - SeaSalt
#   OFFLINE_SOILNOX     - SoilNOx
#--------------------------------------------------------------
    --> OFFLINE_DUST           :       true     # 1980-2020
    --> OFFLINE_BIOGENICVOC    :       true     # 1980-2020
    --> OFFLINE_SEASALT        :       true     # 1980-2020
    --> OFFLINE_SOILNOX        :       true     # 1980-2020
# ----- NON-EMISSIONS DATA ------------------------------------
    --> UVALBEDO               :       true     # 1985
    --> CCM_STRAT_Bry          :       true     # 2007
    --> GMI_STRAT_OH           :       true     # 2005
    --> GMI_PROD_LOSS          :       true     # 2005
    --> UCX_PROD_LOSS          :       false    # 2013   
    --> OMOC_RATIO             :       false    # 2010
    --> GMD_SFC_CH4            :       true     # 1979-2020
    --> CMIP6_SFC_CH4          :       false    # 1750-1978
    --> OLSON_LANDMAP          :       true     # 1985
    --> YUAN_MODIS_LAI         :       true     # 2005-2016
    --> RRTMG                  :       false    # 2002
    --> SfcVMR                 :       true     # 1750-2014
    --> OCEAN_O3_DRYDEP        :       true     # 1985
# -----------------------------------------------------------------------------
100     Custom                 : off   -
101     SeaFlux                : on    DMS/ACET/ALD2/MENO3/ETNO3/MOH
102     ParaNOx                : on    NO/NO2/O3/HNO3
    --> LUT data format        :       nc
    --> LUT source dir         :       $ROOT/PARANOX/v2015-02
103     LightNOx               : on    NO
    --> CDF table              :       $ROOT/LIGHTNOX/v2014-07/light_dist.ott2010.dat
104     SoilNOx                : off   NO
    --> Use fertilizer NOx     :       true
105     DustDead               : off   DST1/DST2/DST3/DST4
106     DustGinoux             : off   DST1/DST2/DST3/DST4
107     SeaSalt                : off   SALA/SALC/SALACL/SALCCL/SALAAL/SALCAL/BrSALA/BrSALC/MOPO/MOPI
    --> SALA lower radius      :       0.01
    --> SALA upper radius      :       0.5
    --> SALC lower radius      :       0.5
    --> SALC upper radius      :       8.0
    --> Model sea salt Br-     :       true
    --> Br- mass ratio         :       2.11e-3
108     MEGAN                  : on    ISOP/ACET/PRPE/C2H4/ALD2/MOH/EOH/MTPA/MTPO/LIMO/SESQ/SOAP/SOAS
    --> Isoprene scaling       :       1.0
    --> CO2 inhibition         :       true
    --> CO2 conc (ppmv)        :       390.0
    --> Isoprene to SOAP       :       0.015
    --> Isoprene to SOAS       :       0.015
    --> Monoterp to SOAP       :       0.050
    --> Monoterp to SOAS       :       0.050
    --> Othrterp to SOAP       :       0.050
    --> Othrterp to SOAS       :       0.050
111     GFED                   : on    NO/CO/ALK4/ACET/MEK/ALD2/PRPE/C3H8/CH2O/C2H6/SO2/NH3/BCPO/BCPI/OCPO/OCPI/POG1/POG2/MTPA/BENZ/TOLU/XYLE/NAP/EOH/MOH/SOAP
    --> GFED4                  :       true
    --> GFED_daily             :       false
    --> GFED_3hourly           :       false
    --> Scaling_CO             :       1.05
    --> Scaling_NAP            :       2.75e-4
    --> hydrophilic BC         :       0.2
    --> hydrophilic OC         :       0.5
    --> fraction POG1          :       0.49
    --> CO to SOAP             :       0.013
    --> GFED_subgrid_coag      :       false
#see the note near scale factor 281 for the source of this emis factor
114     FINN                   : off   NO/CO/ALK4/ACET/MEK/ALD2/PRPE/C3H8/CH2O/C2H6/SO2/NH3/BCPI/BCPO/OCPI/OCPO/GLYC/HAC/SOAP
    --> FINN_daily             :       false
    --> Scaling_CO             :       1.0
    --> Scaling_SOAP           :       0.013
    --> hydrophilic BC         :       0.2
    --> hydrophilic OC         :       0.5
    --> FINN_subgrid_coag      :       false
115     DustAlk                : off   DSTAL1/DSTAL2/DSTAL3/DSTAL4
117     Volcano                : on    SO2
    --> Volcano_Source         :       AeroCom
    --> Volcano_Table          :       $ROOT/VOLCANO/v2019-08/$YYYY/$MM/so2_volcanic_emissions_Carns.$YYYY$MM$DD.rc
120     Inorg_Iodine           : on    HOI/I2
    --> Emit HOI               :       true
    --> Emit I2                :       true
130     TOMAS_Jeagle           : off   SS1/SS2/SS3/SS4/SS5/SS6/SS7/SS8/SS9/SS10/SS11/SS12/SS13/SS14/SS15/SS16/SS17/SS18/SS19/SS20/SS21/SS22/SS23/SS24/SS25/SS26/SS27/SS28/SS29/SS30/SS31/SS32/SS33/SS34/SS35/SS36/SS37/SS38/SS39/SS40
### END SECTION EXTENSION SWITCHES ###

If you would like to turn off NEI2011, simply change the true in this line:

     --> NEI2011           :       true

to false:

     --> NEI2011           :       false

And if you also wanted to turn off the MEGAN biogenic emissions, simply change the on in this line:

108     MEGAN             : on    ISOP/ACET/PRPE/C2H4/ALD2

to off:

108     MEGAN             : off    ISOP/ACET/PRPE/C2H4/ALD2

etc.

For more information about the available inventories that you can use with HEMCO, please see our HEMCO data directories wiki page.


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